Add 7/2 and 8/21
1st number: 3 1/2, 2nd number: 8/21
72 + 821 is 16342.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
72 = 7 × 212 × 21 = 14742 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
821 = 8 × 221 × 2 = 1642 - Add the two like fractions:
14742 + 1642 = 147 + 1642 = 16342 - So, 7/2 + 8/21 = 163/42
In mixed form: 33742
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